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APPENDIX B — CCN TABLES
Status Tables
DESCRIPTION VALUE UNITS POINT NAME
TSTAT_IN (Thermostat Input)
Indoor Fan Status-CIRA Off/On IDFA_FS
Y1 Thermostat Input Off/On Y1
Y2 Thermostat Input Off/On Y2
Indoor Fan Status-CIRB Off/On IDFB_FS
Y3 Thermostat Input Off/On Y3
Y4 Thermostat Input Off/On Y4
A_UNIT (General Unit Parameters)
Control Mode 10-char ASCII STAT
Space Temp Control Mode N SPTMODE
Occupied No/Yes OCC
CCN Chiller stop/start CHIL_S_S
Alarm State 6-char ASCII ALM
4-20 Cooling Demand NN.n milliAmps COOL_MA
Active Demand Limit NNN % DEM_LIM
Override Modes in Effect No/Yes MODE
Percent Total Capacity NNN % CAP_T
Requested Stage NN STAGE
Active Set Point NNN.n degF SP
Control Point NNN.n degF CTRL_PNT
Return Air Temperature NNN.n degF RETURN_T
Supply Air Temperature NNN.n degF SUPPLY_T
Emergency Stop Enable/EMStop EMSTOP
Minutes Left for Start 5-char ASCII MIN_LEFT
CIRCA_AN (Circuit A Analog Parameters)
Percent Total Capacity NNN % CAPA_T
Percent Available Capacity NNN % CAPA_A
Discharge Pressure NNN.n PSIG DP_A
Suction Pressure NNN.n PSIG SP_A
Head Set Point ON NNN.n degF HSP_ON
Head Set Point OFF NNN.n degF HSP_OFF
Saturated Condensing Temperature NNN.n degF SCTA
Saturated Suction Temperature NNN.n degF SSTA
Variable Head Press Out Circuit A NNN.n % VHPA_ACT
Compressor Return Gas Temperature NNN.n degF RGTA
Discharge Gas Temperature NNN.n degF DIGCMPDT
Suction Superheat Temperature NNN.n deltaF SH_A
CIRCADIO (Circuit A Discrete Inputs/Outputs)
CIRC.A DISCRETE OUTPUTS
Compressor A1 Relay Off/On K_A1_RLY
Comp A1 Load Percent NNN.n % DIGITAL%
Compressor A2 Relay Off/On K_A2_RLY
Compressor A3 Relay Off/On K_A3_RLY
Minimum Load Valve Relay Off/On MLV_RLY
Liquid Line Solenoid A Off/On LLSV_A
CIRC.A DISCRETE INPUTS
Compressor A1 Feedback Off/On K_A1_FBK
Compressor A2 Feedback Off/On K_A2_FBK
Compressor A3 Feedback Off/On K_A3_FBK
High Pressure Switch A Open/Close HPSA